{
    
    //题目就是求质因数
    function lala(num){
        let a=[];
        let i=2;

        function haha(num,index) {
            if(index>num){
                return
            }

            if(num%index==0){
                a.push(index);
                
                return haha(num/index,index);
            }else{
                
                return haha(num,index+1);
            }

        }
        haha(num,i);
        return a;
    }

}